Tubby Kat features a transparent unbreakable Lexan flap with 2-way operation and weatherproof design. http://www.petco.com
Our larger cat flap fits cats and dogs up to 25 pounds, and is designed primarily for installation into an interior door, where environmental integrity will not be an issue. The door features an unbreakable polycarbonate 7 and 1/2 by 10 and 1/2 inch flap, with magnetic closure. The strong telescoping plastic frame adjusts to fit most door thicknesses from 1 and 1/4 to 1 and 3/4 inches. And our four-way lock allows you to select from the following positions: open, allowing free access in both directions; out only; locked in both directions; and in only. All of our doors are easy to install and have a limited lifetime warranty.